Re-sizing text boundary box - sometimes fiddly

When you need to resize a text boundary box (also others such as crop:rectangle), I often find the process very fiddly and hit-and-miss, especially when the boundary box fills the preview screen.
I made this very short video showing what I mean. (No sound on the video):

This isn’t necessarily a problem with the latest version - I’ve wondered about this for a long time. @shotcut, I wondered if it was possible to make the mouse respond, when hovered close to the corner boxes, over a wider range of pixels? Thank you.